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Kondo, Yasuhiro; Takei, Hayanori; Yee-Rendon, B.; Tamura, Jun
Purazuma, Kaku Yugo Gakkai-Shi, 98(5), p.222 - 226, 2022/05
A superconducting accelerating cavity is indispensable to realize a driver linac that meets the requirements of ADS. The low-energy section of the accelerators, which is normal conducting one, was redesigned to reflect the recent progress in the development of superconducting accelerator cavities. In addition, we are developing a prototype cavity for the spoke-type cavity that has not been developed well. This section reports on the latest research and development of ADS linacs at the Japan Atomic Energy Agency.
Am reactor activation measurements
erovnik, G.*; Schillebeeckx, P.*; Becker, B.*; Fiorito, L.*; Harada, Hideo; Kopecky, S.*; Radulovic, V.*; Sano, Tadafumi*
Nuclear Instruments and Methods in Physics Research A, 877, p.300 - 313, 2018/01
Times Cited Count：5 Percentile：45.24(Instruments & Instrumentation)Methodologies to derive cross section data from spectrum integrated reaction rates were studied. The Westcott convention and some of its approximations were considered. The accuracy of the results strongly depends on the assumptions that are made about the neutron energy distribution, which is mostly parameterised as a sum of a thermal and an epi-thermal component. Resonance integrals derived from such data can be strongly biased. When the energy dependence of the cross section is known and information about the neutron energy distribution is available, a method to correct for a bias on the cross section at thermal energy is proposed. Reactor activation measurements to determine the thermal Am(n, 
) cross section reported in the literature were reviewed, where the results were corrected to account for possible biases. These data combined with results of time-of-flight measurements give a capture cross section 720 (14) b for Am(n, ) at thermal energy.
U doppler effect in the soft neutron spectra using FCA (Joint research)Ando, Masaki; Kawasaki, Kenji*; Okajima, Shigeaki; Fukushima, Masahiro; Matsuura, Yutaka*; Kaneko, Yuji*
JAERI-Research 2005-026, 39 Pages, 2005/09
JAERI-Research-2005-026.pdf:4.37MB
U Doppler effect measurements in moderated neutron spectra (uranium fuel and MOX simulated fuel) were carried out using FCA for the purpose of contributing to the improvement in prediction accuracy for Doppler coefficient in LWR. In the mockup cores for MOX fuel, the measurements were performed in different neutron spectra, where the voidage of moderator material was varied systematically. The experimental data were obtained using cylindrical uranium samples with different outer diameter up to 800
C. Analyses were performed using a standard code system designed to analyze fast reactor mock-up experiments at FCA with the use of the JENDL-3.2 library. The results of the analyses showed that the calculation accuracy did not depend on the types of the core fuel or the Doppler samples. The calculated values agreed with the experimental ones within the experimental error. Any dependency of the prediction accuracy on the neutron spectra was not observed in the MOX simulated fuel cores.
potential energy surfaces for the lowest three doublet states (1
A', 2A', and 1A") of the BrH
systemKurosaki, Yuzuru; Takayanagi, Toshiyuki
Journal of Chemical Physics, 119(15), p.7838 - 7856, 2003/10
Times Cited Count：26 Percentile：63.55(Chemistry, Physical)Adiabatic potential energy surfaces of the lowest three doublet states (1A', 2A', and 1A") for the BrH system have been calculated globally using the MRCI+Q method with the aug-cc-pVTZ basis set. Spin-orbit effects were considered on the basis of Breit-Pauli Hamiltonian. The calculated adiabatic energies were fitted to the analytical functional form of many-body expansion. The barrier heights of the abstraction and exchange reactions on the ground-state PES were calculated to be 1.28 and 11.71 kcal mol
, respectively, at the MRCI+Q/aug-cc-pVTZ level of theory. The fits for the three PESs were successful within the accuracy of 0.1 kcal mol. Thermal rate constants for the abstraction and exchange reactions and their isotopic variants were calculated with the fitted 1A' PES using the ICVT/LAG method. The calculated rate constants for the abstarction reactions agree fairly well with experiment but those for the exchange reactions were much smaller than experiment, which suggests that the reliable experimental data are still insufficient.
Sugie, Tatsuo; Costley, A. E.*; Malaquias, A.*; Medvedev, A.*; Walker, C.*
Proceedings of 30th EPS Conference on Controlled Fusion and Plasma Physics (CD-ROM), 4 Pages, 2003/07
The main functions of the Divertor Impurity Monitor are to measure the parameters of impurities and isotopes of hydrogen in the divertor plasmas by using spectroscopic techniques in the wavelength range of 200-1000 nm. This system will have three different types of spectrometers; a) Visible survey spectrometers for impurity species monitoring. b) Filter spectrometers for two-dimensional measurements of particle influxes. c) High dispersion spectrometers for measuring the ion temperature and the particle energy distribution. The divertor region will be observed from the divertor-, the equatorial- and the upper-port. Optical components, such as mirrors, windows etc, mounted close to the plasma will experience higher levels of radiation due to neutron, gamma ray and/or particle irradiations than in present devices. Therefore, the materials of the components have to be carefully selected and mitigating methods adopted where possible. In addition, in-situ and remote calibration methods for diagnostic systems, which will be installed in the strong radiation field, are absolutely essential.
ROSA-V Group
JAERI-Tech 2003-037, 479 Pages, 2003/03
JAERI-Tech-2003-037.pdf:19.25MB
no abstracts in English
and 
shells of one-electron systems calculated within an exact relativistic descriptionIchihara, Akira; Eichler, J.*
Atomic Data and Nuclear Data Tables, 79(2), p.187 - 222, 2001/11
Times Cited Count：10 Percentile：56.07(Physics, Atomic, Molecular & Chemical)no abstracts in English
Sakamoto, Yukio; Yamaguchi, Yasuhiro
JAERI-Tech 2001-042, 29 Pages, 2001/06
JAERI-Tech-2001-042.pdf:1.79MB
no abstracts in English
Kugo, Teruhiko; Kaneko, Kunio*
Mathematics and Computation, Reactor Physics and Environmental Analysis in Nuclear Applications, 2, p.2113 - 2122, 1999/09
no abstracts in English
Teshigawara, Makoto*; Watanabe, Noboru*; Takada, Hiroshi; Kai, Tetsuya; Nakashima, Hiroshi; ; Oyama, Yukio; Ikeda, Yujiro; Kosako, Kazuaki*
JAERI-Research 99-020, 33 Pages, 1999/03
JAERI-Research-99-020.pdf:1.83MB
no abstracts in English
Matsubayashi, Masahito; ; J.T.Lindsay*
Nuclear Instruments and Methods in Physics Research A, 424(1), p.165 - 171, 1999/00
Times Cited Count：2 Percentile：27.52(Instruments & Instrumentation)no abstracts in English
JAERI-Review 98-006, 194 Pages, 1998/03
JAERI-Review-98-006.pdf:8.23MB
no abstracts in English
V.M.Maslov*;
JAERI-Research 96-030, 68 Pages, 1996/06
JAERI-Research-96-030.pdf:2.21MB
no abstracts in English
; Onuki, Akira; Murao, Yoshio
Proc. of the 2nd Int. Conf. on Multiphase Flow 95-Kyoto, 0, p.P2_37 - P2_44, 1995/00
no abstracts in English
; Murao, Yoshio; Tasaka, Kanji
Nihon Genshiryoku Gakkai-Shi, 28(10), p.887 - 907, 1986/00
no abstracts in English
; Murao, Yoshio
JAERI-M 83-091, 108 Pages, 1983/06
no abstracts in English
; Murao, Yoshio
JAERI-M 83-090, 86 Pages, 1983/06
no abstracts in English
Tasaka, Kanji; ; ; ; ; C.P.Fineman*; D.R.Bosley*;
JAERI-M 9849, 67 Pages, 1981/12
no abstracts in English
; Shimooke, Takanori; Murao, Yoshio
JAERI-M 9397, 90 Pages, 1981/03
no abstracts in English
